Dipper-trip for steam-shovels.



A. H. GEDDBS DIPPEB. TRIP FOR STEAM SHOVELS. APPLIQATION 11.21) JUNE 21, 1910.

978,575; Patented Dec. 13,1910.

- 2 mantra-sum 1.

V IN VE N TOR JWiWz/mwzm ATTDRHEYS A. H. GEDDES. DIPPBR TRIP FOR STEAM SHOVELS. APPLIOATION PILED JUNE 21, 1910.

978,575. Pa,tented Dec. 13, 1910.

2 8HEETB BHBBT 2.

I, as

/ 0 I My ATTORNEYS 35; a suitable 'spring.'

;UNITED STATES PATENT OFFICE.

- "ALBERT H. ennnns', ornmrmnranma.

- To-all whom time concern:

Be itknown. that I, ALBERT H. Gnnnns,

' a citizen of the United States, and a resident of Empire, Canal Zone, Re ublie of 5 Panama' i lriave'inventeda new and mproved Thisinvention relates to dipper trips for steam shovels, dredges and the like, and

1 has reference more particularly to the combination in a steam shovel w1th azdlpper,

a door therefor, and means for operat n the dip er, of a latch for the door, a cyinder a apted to receive a fluid. under pressure,a PlStOIl in the cyl nder, and means for operati'vely connecting the plstonfand the la ch, whereby the piston can/be actuated to release the door.

".20 ,The object of theinvention is. to provide a simp'le' and. efiicientdipper tllp for use 111. connectionwith steam shovels, dred es, 1 and like machines for excavating and ot er urposes, by means of whlch the door of the.

ipper -or bucket/can be releasedmechani l to empty the bucket, thereby obviating the necessity of pulling-manna 1y upon a ropeor the like to release the door, and thus saving time and labor, which renders the operation of the steam shoveL-or dredge 8 more rapid and "economical, which can operated by steam or other flu1d under pressure, and which, after each operation, is

returned to a normal position by means of The invention consists in the construction andcombination of parts'to be more-fully described hereinafter and particularlysetforth in the claims.

Reference is to be had to theaccompanying. drawings forming a part of this specl- Yfication', in which simllar characters of reference' indicate corresponding parts in "all the views,- and in wh1ch- Figure -1 is a side elevation of a steam l shovel havingan embodiment of my invention applied thereto; Fig.1 2 is an inverted Ian view of adipper or bucket, showing the -l atch for-locking the, door; Fig. 3 1s an entracks.

Link. members 25 are secured Specification of Letters Patent. Patented Dec. 13, 1910. h I Application filed June 21, 1910. Serial No.

6 e 0 Fig. 4.: 1

I Before proceeding to a more detailed explanation of my invention, it should be clearly understood that the same can be ad- 'Dipperip. for Steam-Shovels, of which vantageously employedwith steam shovels, the following is'a full, clear, and exact 116-. dredges or other apiparatus having di pers I i ti n, or buckets provide with" releasa 1e. core which are held closed by means of latches, and in which the latches can be released to permit the contents ucket, in the operation of the apparatus.

and Fi 6 is a transverse section on the line to escape a from the Certain of the details of construction 2 shown for example herewith, form no part of the invention, and can be varied inaccordance with mdividual reference and s eci al conditions, without' epartin'g from t e underlying spirit ofthe invention.

Referring more particularly to the drawings, I have shown .a steam shovel of conventionalrtype, havin a car 10 carried upon wheeled trucks 11, an

adapted to'ru'n upon The car carries a boiler,12, for proucin steam to operate the shovel, and is provi ed with a sultable engine for this purose. At one end of the The dipper stickor'handle is fashioned from two-channels 17, arranged back to back, and

spaced, being secured together in anysuitable manner. The dipper stick, controlled by the bull wheel 18, is arranged'to move in the direction of its length. At the forward end it has a dipper stick casting 19 having upwardly disposedfextensions 20', provide w1th openings 21'. The dipper or bucket 22 .has extensions 23- pivotally connected with the extensions 20 by means of a hinge pin 24, which extends through the openings 21.

to the" ip r and to theidip er. stick. The bucket has at car is located the ion theopen end t e usual bail 26, to which is connected the pad-lock 27. A chain 28 is attached to the pad-lock and passes over sheaves 29 to the operating enpulley or l 50'1arged, fragmentary section of part of the ginet .(not shown), in the usual manner.

-.cyl1nder,jshowing a constructive. deta l, Fig. t W111 be understood that the engine actu-.v

- 4 is an enlarged, side elevation of theend of ates the chains to effect the "OPGIBJZIOD. of the thedipper stick or handle, showing 1 n longlbucket, and also serves to move the dipper tu'dinal section the cylinder.;. Fig. 5 1s a lon- I stick, and to swing'the boom. 55 gitudinal section-on the line 5'5 of Fig. 4; A cylinder 30, open at one end, and pro- 110 vided at theother' with a head 31", having a 'means of which it is. pivotally associated with the hingepin 24, and is thereby mount; ed to swing to close the rear end of the bucket, in the normal position. Upon the door-is arrangeda latch, including a bolt bar 43,; the end of which, when inserted in a keeper44, on the bucket, serves to hold thedoor 'closed. The bolt bar is pivotally secured to a lever connected by a link 46 with a lever 47 The-levers,45 and 47 arepivotally mounted upon the .door, and are pivotally connectedby the link. The chain 38 is secured at the end of the lever 47. By

drawing upon the chain, the bolt bar is retracted, to release the latch, to permit the door to swing open gravitationally, permitting the bucket to empty.

At the open end, the cylinder has a spider 48 against which presses a spring '49. The

spring likewise engages the piston, and tends to move it toward the head 31 of the cylinder. The" chain hasa ball 50 constituting a .stop,which is adapted-to engage the guide eye 39 and thereby to limit the movement of the chain. 3The.cylinder,'near .the head, has

an 'internal, 'annular shoulder 51 which forms an abutment for the piston, and limits the movement thereof,.and preventsthe-piston-from. engaging the head directly, thus forming :a certain clearance. -.The cylinder,

at one'side', near theuhead has an extension 52, provi'ded with a passage 53 communi-T- eating interiorly with the cylinder and with a passa 'e. 54 terminatingvin an enlarged threade part 55,.adapted to receive the correspondingly threaded'end 56 of a union 57 I mounted at the, end of a flexible tube 58.

The latter is connected with a three-way valve 59,. mounted at the end of a pipe 60 which leads to the boiler 12, or to any other suitable source of supply for fluid under pressure.

crating handle 61, and anoutlet 62. The o'perators, seat 63, islocated at one end of the boom," sothat he can conveniently con-" The'three-way valve has an optrol the three-way valve. The tube 58 may be ofiany suitable kind, and is' preferably .w'ired,' to' prevent rubber or other material being carriedinto the-cylinder. .The passage 54 of'theextension 52' is open-at the end remote from the. union 56, and has a valve casing 64 mounted over the open. end.

The valve casing has a seat 65 adapted to be closed by a valve 66, provided 'Wlth a stem 67, passingthrough a guide 68-. A

engaging a lug thereof, presses upon the guide 68 and tends to hold thevalve nor- I mally open.

In its normal position, the piston 35 is cylinder, by the spring 49. This permits the chain to be extended so that the bolt .bar of the latch is in operative relation with After the dipper has been filled with material, and when it is desired to-e'mpty the dipper, the three-way valve 59, which is normally closed, is opened tofipe'rmit steam or other fluid under pressure to enter the cylinder, and to move the piston toward the open end of the'cylinder, against the tenchain 38, and operates the latch to withdraw the bolt bar. The door swings open, and the contents of the bucket escape. The threeway valve is then operated to open the out let 62 to the atmosphere, and the steam withreturning the iston to its normal position. The door of 'th closed, and. latched. The stop 50 limits the movement of the chain; The spring 69 of the .valve' 66 is so adjusted that as soon as the pressure within the cylinder is matecylinder can be freed from accumulated water of condensation, the piston serving to force the water from the cylinder, as it is returned to its normal position by the spring 49.

erating said dipper, of a latch for said door,

pressure, a piston within said cylinder, means for operatively connecting said piston and said latch, wherebythe latter can be re leased by said piston, means for holding said step carried by said means for. operatively serving to limit/the movementof said piston.

eratlng said dipper, of a latch for said door, a cylinder adapted'to receive a fluid under pressure and having a piston therein, a flexible elongated member-connecting said piston and said latch, a guide for said member, and a'stop onsaid member and adapted'to engage a said guide to limit the movement thereof.

3. 'ln'asteain shovel,'the combination with spring 69 mounted upon the valve stem and held against the stop-shoulder 51 0f the the keeper 44, and holds the door closed-.-

e bucket can then be again.

rially reduced, the valve will open and the Having thus described my invention, I" claim as new, and desire to secure by Letters 1. In a steam shovel, the combination, with a di-pper,.a door therefor, and means for opconnecting said piston and said latch and .120 2 'In'a steam shovel, the combination with a dipper, a door. therefor, and means for opsion of the spring 49. This pulls upon-the a in the cylinder escapes therefrom, the spring a cylinder adapted to receive a fluid under piston in a-normal position such that said. latch is operative to lock said door, and a a dipper stick, a dipper carried thereby, a

- door tor said dipper, and means for operating said dipper, of a cylinder mounted upon said dip er stick and adapted to receive a fluid un er pressure, a piston in said cylinder and having a piston rod, a flexible member connecting said rod and said latch, a grooved guide pulley mounted upon said stick and having said flexible member pass aroundthe same, a guide-eye mounted upon said stick and having said member pass through it, and a sto secured to said flexible member and adapts to engage. said guideeye to limit the movement of said member.

4. In a steam shovel, the combination with a dipper,*a dipper stick carrying said dipper, a door for said dipper, and means for manipulating said dipper, of -a latch for said door, a cylinder adapted to receive a fluid under pressure, and mounted upon said dipper stick, said cylinder having at one end a head and being open at the other end, a spider at said open end, a piston within said cylinder and having a piston rod, said head havinga stufiin box said piston rod passing through sai stufling-box, a spring within said cylinder and engaging said piston and said spider and tending to move said piston toward said head, a chain operatively connecting said piston rod and said latch, a grooved guide pulley mounted upon said dipper stick and having said chain pass tween said piston and said latch, a spring tending to hold said dpiston in a normal position such that sai hold said door closed, said cylinder havixw therein a stop shoulder serving to space said piston from one end thereof, said cylinder having an inlet, a pipe for directing fluid to said inlet, a valve for controlling said pipe, said cylinder havin a draining opening, and a valve controlling said draining opening and adapted to 0 en when the pressure in said cylinder fa ls to a predetermined point.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ALBERT H. GEDDES.

latch is operative to \Vitnesses JOHN K. BRAGHVOGEL, PHILIP D. ROLLHAUS. 

